A judge is considering whether the man charged in the deaths of his fiancee and two Weleetka girls was mentally competent when he waived his Miranda rights and allegedly confessed to the crimes.

After hours of testimony Tuesday, Judge Lawrence Parish said he would issue a written ruling at a later date on Kevin Sweat's competency.

The Tulsa World reports that (http://bit.ly/1l1xysc ) defense attorneys argue that Sweat was mentally incompetent when he waived his right to remain silent and told a state investigator that he shot what he thought were two "monsters" on a rural county road.

Sweat is charged with first-degree murder for the 2008 deaths of 11-year-old Skyla Whitaker and 13-year-old Taylor Paschal-Placker and the 2011 death of his fiancee, Ashley Taylor.